[mrtg] Re: Cisco Buffer Hits OID

[Grendel]

Hi,
	This is a non-Cisco answer, but next to the ifInOctets and ifOutOctets
branches, there are references for discards and errors. According to the
description for discards at
http://www.alvestrand.no/harald/objectid/1.3.6.1.2.1.2.2.1.13.html :

 "The number of inbound packets which were chosen
 to be discarded even though no errors had been
 detected to prevent their being deliverable to a
 higher-layer protocol.  One possible reason for
 discarding such a packet could be to free up
 buffer space."

	So an MRTG target for a graph of in and out discards for interface
number 23 might look something like this:

Target[blort]:
1.3.6.1.2.1.2.2.1.13.23&1.3.6.1.2.1.2.2.1.19.23:public at 192.168.1.1

	And I'm looking at the cfgmaker code right now, trying to figure out
how hard it would be to modify it to graph more than one characteristic
for an interface...

Best regards,
James Overbeck
GMO - http://www.gmo.co.jp/
Tokyo, Japan


Jonathan Ford wrote:
> 
> My apologies for straying from the group topic. I too am trying to convince
> management that our WAN speeds need to be upgraded and have met with the
> same "where's the problem?" response. I was hoping that you could direct me
> to the source of the 50% rule of thumb so I could show some "black & white"
> proof that this is true.
> 
> Any suggestions would be helpful,
> 
> Jonathan Ford
> IS Analyst
> Elliptus Technologies
> Manchester, NH
> 
> ----- Original Message -----
> From: "Patrick Bartkus" <patrckb at hotmail.com>
> To: <mrtg at list.ee.ethz.ch>
> Sent: Tuesday, April 03, 2001 2:30 PM
> Subject: [mrtg] Cisco Buffer Hits OID
> 
> >
> > I'm trying to convence management that certain WAN links need help. They
> see
> > the utilization bouncing between 50% and 75% and say, "what's the problem?
> > There's plenty of capacity left." They don't want to hear that the rule of
> > thumb is 50% == full.
> >
> > So, I want to graft Cisco buffer hits. If, I can show them that the
> buffers
> > keep getting hit, that that means that packets are having to get queued up
> > to get across the WAN link. A queued packet is a delayed packet.
> >
> > I've been trying to find the Cisco OID for buffer hits and can't seem to
> > find one. I'm looking for the values you see when you type "show buffers."
> >
> > In OLD-CISCO-MEMORY-MIB I found a set of OIDs that seem to relate, but my
> > router (IOS 12.0.9) doesn't seem to have those values in it's tree. I also
> > searched the list archive and didn't find any relevant postings.
> >
> > Anybody have any ideas?
> >
> > Patrick
> > ---
> > Patrick Bartkus, CCNP Certified Sr. Network Support Analyst
> > Fleet Mortgage Group     Columbia, SC
> > If truth was not absolute, how could there be justice?
> >
> > _________________________________________________________________
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